Photometric and Spectroscopic Study of PU Pup

JOURNAL OF OCCULTATION AND ECLIPSE (JOE); ISSN 2522-7955; No. 6, 2019

Edwin Budding¹, Ahmet Erdem^2,3, Derya Sürgit^2,4, Burcu Özkardeş^2,4,
Osman Demircan^2
1Carter Observatory, 40 Salamanca Rd, Kelburn, Wellington 6012, New Zealand
²Astrophysics Research Center and Observatory, Çanakkale Onsekiz Mart University, Terzioğlu Kampusu, 17020 Çanakkale, Turkey
³Department of Physics, Faculty of Arts and Science, Çanakkale Onsekiz Mart University, Terzioğlu Kampusu, 17020 Çanakkale, Turkey
⁴Department of Space Science and Technology, Faculty of Arts and Science, Çanakkale Onsekiz Mart University, Terzioğlu Kampusu, 17020 Çanakkale, Turkey

Abstract
We present the analysis of photometric and spectroscopic observations of the Southern eclipsing binary star PU Pup. We solved the HIPPARCOS light curve of PU Pup and proposed a relatively close binary star model with a rather low mass ratio and low inclination to give the ellipsoidal form of its light variation. Spectroscopic observations of the system were made at the Mt. John University Observatory in 2008 and 2014. Since the light contribution of the secondary component was only 1% of the light contribution of the primary component in the optical wavelengths, the radial velocities of the primary component could be measured. A single-lined spectroscopic orbital solution of PU Pup then was obtained.

Keyword: Close binary systems, Early type stars, Observational techniques, Photometry, Spectroscopy